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Power - Beam (NOT sweep) ·BeamPower-Pentode

6G11

Combination sharp-cutoff pentode and beam-power pentode designed for television FM sound detection followed by Class-A audio power amplification.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 2
Base: 12BU
Socket code: B12C
Base pins: 12
Nominal heater: 6.3 V / 1.2 A

Description

Combination sharp-cutoff pentode and beam-power pentode for FM sound detection and Class A power amplification.

Socket description

Duodecar 12-contact

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base: 12BU
Socket code: B12C
Base pins: 12
Nominal heater voltage: 6.3 V
Nominal heater current: 1.2 A
Parallel heater voltage: -
Parallel heater current: -
Series capable: No

12BU - Terminal pinout

Electrical assignments shared by every tube using this base designation.

No verified pinout is recorded for this base designation.

Section ratings

2 physical sections, each with unique specifications.

Section 1

Pentode

X-ray radiationInterelectrode capacitances

Plate resistance: 150000 Ω
Transconductance: 0.001 S
Max plate voltage: 330 V
Max screen voltage: 330 V
Max plate dissipation: 1.7 W
Max screen dissipation: 1.1 W
Max cathode current: 10 mA

Sharp-cutoff pentode unit.

Section 2

Beam Power

X-ray radiationInterelectrode capacitances

Plate resistance: 25000 Ω
Transconductance: 0.006 S
Max plate voltage: 150 V
Max screen voltage: 135 V
Max plate dissipation: 6.5 W
Max screen dissipation: 1.8 W
Max cathode current: 65 mA

Beam-power unit.

Source-dependent data

Operating conditions by source

Each block preserves the test conditions and published values from one reference. Values from different sources are intentionally kept separate.

Data set 01

1971 RCA HB3 Binder 5 of 7

Published operating points and test conditions from this source.

SECTION 1

Pentode

Other

Heater voltage
6.3 V
Heater current
1.2 A
Plate supply voltage
150 V
PentodeUnit
Screen supply voltage
100 V
PentodeUnit
Cathode resistor
560 ohm
PentodeUnit
Plate current
1.3 mA
PentodeUnit
Screen current
2 mA
PentodeUnit

Characteristic

Plate resistance
150000 ohm
PentodeUnit
Grid No.1 transconductance
1000 uS
PentodeUnit
Grid No.3 transconductance
400 uS
PentodeUnit

Capacitance

Grid No.1-to-plate capacitance
0.034 pF
PentodeUnit
Grid No.3-to-plate capacitance
2.8 pF
PentodeUnit

SECTION 2

Beam Power

Other

Maximum plate voltage
150 V
BeamPowerUnit
Maximum screen voltage
135 V
BeamPowerUnit
Maximum cathode current
65 mA
BeamPowerUnit
Plate dissipation
6.5 W
BeamPowerUnit
Screen input
1.8 W
BeamPowerUnit
Plate voltage
120 V
BeamPowerUnit;ClassA
Screen voltage
110 V
BeamPowerUnit;ClassA
Grid voltage
-8 V
BeamPowerUnit;ClassA

Capacitance

Grid-to-plate capacitance
0.26 pF
BeamPowerUnit
Input capacitance
12 pF
BeamPowerUnit
Output capacitance
12 pF
BeamPowerUnit